Had you thought of using Grief Prevention plugin instead of factions? It doesn't seem to have many ways to get through it's protection. It also has a couple of interesting mechanics. Players start with only a small area, small as a 10x10. This grows in relation to their game time. So the longer you are on the server, the larger an area you have protected. I don't think it has a /home option, not sure. Not having /home and /f home would be better for game play I think. As it stands now you can always head back to your base with /f home, and then set another point for what you are working on. If mining just tp back and forth between mines, etc. Far less likely to encounter zombies. Just one /home options makes the world far less easy to get around.